What sound signal is used for a vessel aground?

A vessel aground is required to sound a specific signal to alert other vessels of its condition. The correct sound signal consists of three strokes of the bell or horn, which are made rapidly, followed by three strokes every minute. This signal is crucial for safety in navigation, as it helps nearby mariners understand that the vessel is in distress and unable to move. The use of this particular signaling pattern is outlined in the International Regulations for Preventing Collisions at Sea (COLREGs), making it an essential knowledge point for operators to ensure they are compliant with maritime safety regulations.

The other options represent different sound signals used for various situations at sea, but none pertain specifically to a vessel aground. Each situation has its defined signaling protocol to convey the appropriate message to other vessels, ensuring safety and communication across the waterway.